/* ==========================================================
   品牌总览 /overview/
   页面作用域：.page-about
   ========================================================== */

.page-about {
  --about-gap: 80px;
  --about-measure: 34em;
  padding-bottom: 96px;
}

@media (min-width: 768px) {
  .page-about {
    --about-gap: 120px;
  }
}

@media (min-width: 1200px) {
  .page-about {
    padding-bottom: 140px;
  }
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: 28px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 40px;
  padding-top: 36px;
  align-items: end;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
    gap: 64px;
    padding-top: 72px;
  }
}

.page-about .about-hero__text {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(34px, 8.6vw, 72px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-ink-900);
}

.page-about .about-hero__title::after {
  content: "";
  display: block;
  width: 68px;
  height: 6px;
  margin-top: 24px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--c-orange-500) 0 55%, var(--c-cyan-300) 55% 100%);
}

.page-about .about-hero__lead {
  max-width: var(--about-measure);
  margin: 26px 0 0;
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-slate-600);
}

@media (min-width: 768px) {
  .page-about .about-hero__lead {
    font-size: 17px;
  }
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 30px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--c-line-200);
  list-style: none;
  font-family: var(--f-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--c-mist-300);
}

.page-about .about-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-hero__meta li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-orange-500);
  flex: none;
}

.page-about .about-hero__meta li:nth-child(2)::before {
  background: var(--c-cyan-600);
}

.page-about .about-hero__meta li:nth-child(3)::before {
  background: transparent;
  border: 1.5px solid var(--c-mist-300);
}

.page-about .about-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-l);
  border: 1px solid var(--c-line-200);
}

/* ---------- 主框架：纵向注释 + 正文 + 章节索引 ---------- */
.page-about .about-frame {
  display: grid;
  gap: 0;
  margin-top: var(--about-gap);
}

@media (min-width: 1120px) {
  .page-about .about-frame {
    grid-template-columns: 84px minmax(0, 1fr) 164px;
    gap: 44px;
    align-items: start;
  }
}

.page-about .about-body {
  min-width: 0;
}

/* 纵向注释栏 */
.page-about .about-spine {
  display: none;
}

@media (min-width: 1120px) {
  .page-about .about-spine {
    display: block;
    position: sticky;
    top: calc(var(--header-total) + 40px);
    padding-top: 30px;
  }
}

.page-about .about-spine__note {
  margin: 0;
  writing-mode: vertical-rl;
  font-family: var(--f-display);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.34em;
  color: var(--c-mist-300);
  border-left: 1px solid var(--c-line-200);
  padding-left: 14px;
}

/* 章节索引 */
.page-about .about-index {
  display: none;
}

@media (min-width: 1120px) {
  .page-about .about-index {
    display: block;
    position: sticky;
    top: calc(var(--header-total) + 40px);
    padding-top: 30px;
  }
}

.page-about .about-index__title {
  margin: 0 0 18px;
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-mist-300);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-index__link {
  display: block;
  padding-left: 12px;
  border-left: 2px solid transparent;
  font-family: var(--f-body);
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-slate-600);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--c-cyan-600);
  border-left-color: var(--c-cyan-600);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  margin-top: var(--about-gap);
}

.page-about .about-section:first-child {
  margin-top: 0;
}

.page-about .about-section__head {
  border-top: 1px solid var(--c-line-200);
  padding-top: 8px;
}

.page-about .about-section__title {
  margin: 12px 0 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
  max-width: 16em;
}

.page-about .about-prose p {
  max-width: var(--about-measure);
  margin: 18px 0 0;
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-slate-600);
}

@media (min-width: 768px) {
  .page-about .about-prose p {
    font-size: 17px;
  }
}

.page-about .about-prose p:first-child {
  margin-top: 24px;
}

.page-about .about-intro {
  max-width: var(--about-measure);
  margin: 22px 0 0;
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-ink-900);
}

/* ---------- 发展阶段时间轴 ---------- */
.page-about .about-stages {
  position: relative;
  list-style: none;
  margin: 40px 0 0;
  padding: 0 0 0 26px;
}

.page-about .about-stages::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 28px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-cyan-300) 0%, var(--c-cyan-600) 42%, var(--c-line-200) 100%);
}

.page-about .about-stage {
  position: relative;
  padding-bottom: 40px;
}

.page-about .about-stage:last-child {
  padding-bottom: 0;
}

.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-cream-050);
  border: 2px solid var(--c-cyan-600);
}

.page-about .about-stage--now::before {
  background: var(--c-orange-500);
  border-color: var(--c-orange-500);
  box-shadow: 0 0 0 4px var(--c-orange-100);
}

.page-about .about-stage__label {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-cyan-600);
}

.page-about .about-stage--now .about-stage__label {
  color: var(--c-orange-700);
}

.page-about .about-stage__title {
  margin: 6px 0 0;
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--c-ink-900);
}

@media (min-width: 768px) {
  .page-about .about-stage__title {
    font-size: 20px;
  }
}

.page-about .about-stage__text {
  max-width: var(--about-measure);
  margin: 10px 0 0;
  font-family: var(--f-body);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-slate-600);
}

/* ---------- 内容板块 ---------- */
.page-about .about-figure-wide {
  margin: 34px 0 0;
}

.page-about .about-figure-wide img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-m);
  border: 1px solid var(--c-line-200);
}

.page-about .about-figure-wide figcaption {
  margin-top: 14px;
  font-family: var(--f-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist-300);
}

.page-about .about-sectors {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  border-top: 1px solid var(--c-line-200);
}

.page-about .about-sector {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  grid-template-areas:
    "no name"
    "no desc";
  column-gap: 16px;
  row-gap: 6px;
  padding: 22px 0;
  border-bottom: 1px solid var(--c-line-200);
}

.page-about .about-sector__no {
  grid-area: no;
  margin: 0;
  font-family: var(--f-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-cyan-600);
  line-height: 1.5;
}

.page-about .about-sector__name {
  grid-area: name;
  margin: 0;
  font-family: var(--f-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ink-900);
}

.page-about .about-sector__link,
.page-about .about-sector__name a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-sector__link:hover,
.page-about .about-sector__link:focus-visible,
.page-about .about-sector__name a:hover,
.page-about .about-sector__name a:focus-visible {
  color: var(--c-orange-700);
  border-bottom-color: var(--c-orange-500);
}

.page-about .about-sector__desc {
  grid-area: desc;
  margin: 0;
  max-width: 44em;
  font-family: var(--f-body);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-slate-600);
}

@media (min-width: 880px) {
  .page-about .about-sector {
    grid-template-columns: 64px 200px minmax(0, 1fr);
    grid-template-areas: "no name desc";
    column-gap: 32px;
    row-gap: 0;
    align-items: baseline;
    padding: 26px 0;
  }
}

/* ---------- 团队数据 ---------- */
.page-about .about-figures {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--c-line-200);
  border: 1px solid var(--c-line-200);
  border-radius: var(--r-m);
  overflow: hidden;
}

@media (min-width: 760px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-figure {
  background: var(--c-sand-100);
  padding: 24px 20px 22px;
}

.page-about .about-figure__num {
  display: block;
  font-family: var(--f-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
  line-height: 1.1;
}

.page-about .about-figure:nth-child(3) .about-figure__num {
  color: var(--c-orange-700);
}

.page-about .about-figure:nth-child(4) .about-figure__num {
  color: var(--c-cyan-600);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 8px;
  font-family: var(--f-body);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-slate-600);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach {
  display: grid;
  gap: 32px;
  margin-top: 4px;
}

@media (min-width: 900px) {
  .page-about .about-reach {
    grid-template-columns: minmax(280px, 400px) minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }
}

.page-about .about-reach__figure {
  margin: 30px 0 0;
}

@media (min-width: 900px) {
  .page-about .about-reach__figure {
    margin-top: 24px;
  }
}

.page-about .about-reach__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-m);
  border: 1px solid var(--c-line-200);
}

@media (min-width: 900px) {
  .page-about .about-reach .about-prose p:first-child {
    margin-top: 24px;
  }
}

/* ---------- 收尾引导 ---------- */
.page-about .about-cta {
  margin-top: var(--about-gap);
  padding: 34px 26px 36px;
  border-radius: var(--r-l);
  background: var(--c-orange-100);
  border: 1px solid rgba(255, 107, 44, 0.22);
  display: grid;
  gap: 26px;
}

@media (min-width: 860px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 48px;
    padding: 46px 52px;
  }
}

.page-about .about-cta__title {
  margin: 0;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
}

.page-about .about-cta__text {
  max-width: 40em;
  margin: 14px 0 0;
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-slate-600);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--c-focus-500);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .about-sector__link {
    transition: none;
  }
}